var isMobile = {
    Android: function() {
        return navigator.userAgent.match(/Android/i);
    },
    BlackBerry: function() {
 

        return navigator.userAgent.match(/BlackBerry/i);
    },
    iOS: function() {
        return navigator.userAgent.match(/iPhone|iPad|iPod/i);
    },
    Opera: function() {
        return navigator.userAgent.match(/Opera Mini/i);
    },
    Windows: function() {
        return navigator.userAgent.
 
match(/IEMobile/i);
    },
    any: function() {
        return (isMobile.Android() || isMobile.BlackBerry() || isMobile.iOS() || isMobile.Opera() || isMobile.Windows());
    }
};

/* 
  [ Detect iOS Version ]
  supports iOS 2.0 or latter
  call iOSversion() function will get:
    status: boolean;  -- get iOS version: true, none: false
    version: int; -- ex 11
    info: string; -- ex IOS 11.2.6 
*/
 

function iOSversion() {
  let d, v;
  if (/iP(hone|od|ad)/.test(navigator.platform)) {
    v = (navigator.appVersion).match(/OS (\d+)_(\d+)_?(\d+)?/);
    d = {
      status: true,
      version: parseInt(v[1], 10) , 
      info: parseInt(v[1], 10)+'.'+parseInt(v[2], 10)+'.'+parseInt(v[3] || 0, 10)
    };
  }else{
    d = {status:false, version: false, info:''}
  }
  return d;
}

let iosVer = iOSversion();
if (iosVer.status) {
  alert('iOS : '+iosVer.info+', version : '+iosVer.version);
  //ex. IOS 11.2.6, version 11

}else{
  console.log('not iPhone or iPad');
}